Add ability to create files from inside the folder view

You have way too many dependencies for 1 controller. You should find a way to consolidate. I can imagine the following:

$scope.folder = Folder.folderResource.get(...)
$scope.folderDocs = Folder.getDocsForFolder($scope.folder)
var createdDoc = Folder.createDocForFolder($scope.folder)
createdDoc.$save()

This would get rid of dependencies of Doc, DocService, FolderDocs